Lets say I add a podcast that has 200 previous episodes, I set it to download "episodes to keep" 10 episodes in "new episodes, newest first" order, so PT will download the newest 10 episode and I will be left with 190 undownloaded episodes, after I listened to a couple episodes and deleted them and there is no new episodes to download, I want PT to go back to the 190 undownloaded and start downloading them to fill up my 10 episode need.